OTP Authentication with Firebase in React Native

This project implements phone number authentication using OTP (One-Time Password) with Firebase in a React Native application. It leverages Firebase Authentication and the expo-firebase-recaptcha package to handle verification.

Features

• Send OTP to a phone number.
• Verify the OTP and sign in the user using Firebase.
• Simple and clean UI with React Native.

Requirements

1. Firebase Setup:

   • Create a Firebase project from the Firebase Console.
   • Add the Android/iOS app to the Firebase project and download the google-services.json or GoogleService-Info.plist file.
   • Enable Phone Authentication from the Firebase Authentication section.

2. Billing Plan:

   • Firebase Phone Authentication requires upgrading to the Blaze Plan (pay-as-you-go). The free Spark plan does not support phone authentication.
   • You can upgrade your Firebase project from the Firebase Console under the Billing section.

Getting Started

Prerequisites

• Node.js and npm installed on your machine.
• Expo CLI installed. You can install it by running:

  npm install -g expo-cli